/Engine/Plugins/Online/OnlineSubsystemUtils/Source/OnlineSubsystemUtils/Public/PartyBeaconClient.h
Delegate triggered when a response from the party beacon host has been received
typedef TBaseDelegate_OneParam< void, [EPartyReservationResult::Type](API\Plugins\OnlineSubsystemUtils\EPartyReservationResult__Type) > FOnReservationRequestComplete